I don't know of anything like that.
Some sort of Nostr services marketplace where devs can promote their latest client, or users can compare the services provided by various paid relays?
It seems like a tool a lot of folks would find useful. I could even see it being worth having dynamic suggestions, based on your WoT.
Say you wanted to see recommendations for a Nostr address provider. If you're logged in, it could look at the domains that are most popular among your WoT, pulling the info from their kind 0, and display a ranked list to the user.
Similarly, if you wanted to see recommendations for Blossom servers, it could look at the kind 10063s of those within your WoT. The same could be done with relays, pulling from their 10002s to determine which ones are most popular.